package com.example.forum.controller;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.User;
import com.example.forum.service.IUserService;
import com.example.forum.utils.MD5Util;
import com.example.forum.utils.StringUtil;
import com.example.forum.utils.UUIDUtil;
import com.sun.istack.internal.NotNull;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Api(tags = "用户接口")
@Slf4j
@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    @ApiOperation("用户注册")
    @PostMapping("/register")
    public AppResult register(@ApiParam("用户名") @RequestParam("username") @NonNull String username,
                              @ApiParam("昵称") @RequestParam("nickname") @NonNull String nickname,
                              @ApiParam("密码") @RequestParam("password") @NonNull String password,
                              @ApiParam("重复密码") @RequestParam("passwordRepeat") @NonNull String passwordRepeat){

        //校验密码和重复密码是否相同
        if(!password.equals(passwordRepeat)){
            log.warn(ResultCode.FAILED_TWO_PWD_NOT_SAME.toString());
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        //准备数据
        User user=new User();
        user.setUsername(username);
        user.setNickname(nickname);
        //处理密码
        //1、生成盐
        String salt= UUIDUtil.UUID_32();
        //2、生成密码的密文
        String encryptPassword= MD5Util.md5Salt(password,salt);
        //3、设置密码和盐
        user.setPassword(encryptPassword);
        user.setSalt(salt);

        //调用Service方法
        userService.createNormalUser(user);
        return AppResult.success();
    }

    //用户登录
    @ApiOperation("用户登录")
    @PostMapping("/login")
    public AppResult login(HttpServletRequest request,
                           @ApiParam("用户名") @RequestParam("username") @NonNull String username,
                           @ApiParam("密码") @RequestParam("password") @NonNull String password){
        //调用service的登录方法
        User user=userService.login(username,password);
        if(user==null){
            log.warn(ResultCode.FAILED_LOGIN.toString());
            return AppResult.failed(ResultCode.FAILED_LOGIN);
        }
        //如果登录成功把user对象设置到session作用域中
        HttpSession session=request.getSession(true);
        session.setAttribute(AppConfig.USER_SESSION,user);
        //返回登录
        return AppResult.success();
    }

    @ApiOperation("获取用户信息")
    @GetMapping("/info")
    public AppResult<User> getUserInfo(HttpServletRequest request,
                                       @ApiParam("用户id") @RequestParam(value = "id",required = false) Long id){
        //定义返回的user对象
        User user=null;
        if(id==null){
            //1、如果id为空，从session中获取用户信息
            HttpSession session=request.getSession(false);
            //获取用户信息
            user=(User)session.getAttribute(AppConfig.USER_SESSION);
        }else{
            //2、如果id不为空，从数据库中按id查询用户信息
            user=userService.selectById(id);
        }
        //判断用户对象是否为空
        if(user==null){
            return AppResult.failed(ResultCode.FAILED_USER_EXISTS);
        }
        //返回正常结果
        return AppResult.success(user);
    }

    @ApiOperation("退出登录")
    @GetMapping("/logout")
    public AppResult logout(HttpServletRequest request){
        //获取session对象
        HttpSession session=request.getSession();
        //判断session是否有效
        if(session!=null){
            log.info("退出成功");
            session.invalidate();
        }
        return AppResult.success("退出成功");
    }

    @ApiOperation("修改个人信息")
    @PostMapping("/modifyInfo")
    public AppResult modifyInfo(HttpServletRequest request,
                                @ApiParam("用户名") @RequestParam(value = "username",required = false) String username,
                                @ApiParam("昵称") @RequestParam(value = "nickname",required = false)String nickname,
                                @ApiParam("性别") @RequestParam(value = "gender",required = false)Byte gender,
                                @ApiParam("邮箱") @RequestParam(value = "email",required = false)String email,
                                @ApiParam("电话号") @RequestParam(value = "phoneNum",required = false)String phoneNum,
                                @ApiParam("个人简介") @RequestParam(value = "remark",required = false)String remark){
        //1.非空校验
        if(StringUtil.isEmpty(username)&&StringUtil.isEmpty(nickname)
                &&StringUtil.isEmpty(email)&&StringUtil.isEmpty(phoneNum)
                &&StringUtil.isEmpty(remark)&&gender==null){
            //返回错误信息
            return AppResult.failed("请输入要修改的信息");
        }
        //从session中获取用户Id
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //2.封装对象
        User updateUser=new User();
        updateUser.setId(user.getId());
        updateUser.setUsername(username);
        updateUser.setNickname(nickname);
        updateUser.setGender(gender);
        updateUser.setEmail(email);
        updateUser.setPhoneNum(phoneNum);
        updateUser.setRemark(remark);
        //调用service方法
        userService.modifyInfo(updateUser);
        //查询最新的用户信息
        user=userService.selectById(user.getId());
        session.setAttribute(AppConfig.USER_SESSION,user);
        return AppResult.success(user);
    }

    @ApiOperation("修改密码")
    @PostMapping("/modifyPwd")
    public AppResult modifyPassword(HttpServletRequest request,
                                    @ApiParam("原密码") @RequestParam("oldPassword") @NotNull String oldPassword,
                                    @ApiParam("新密码") @RequestParam("newPassword") @NotNull String newPassword,
                                    @ApiParam("确认密码") @RequestParam("passwordRepeat") @NotNull String passwordRepeat){
        //1.校验新密码
        if(!newPassword.equals(passwordRepeat)){
            return AppResult.failed(ResultCode.FAILED_TWO_PWD_NOT_SAME);
        }
        //2.获取当前登录的用户信息
        HttpSession session=request.getSession(false);
        User user=(User)session.getAttribute(AppConfig.USER_SESSION);
        //3.调用Service
        userService.modifyPassword(user.getId(),newPassword,oldPassword);
        //4.销毁session
        if(session!=null){
            session.invalidate();
        }
        //5.返回结果
        return AppResult.success();
    }
}
